Table 2 Conventional Testing Regime: Public Sexual Health Clinic Setting (Funded by State Government)
True HIV Positive (PHIV ) | True HIV Negative (1 − PHIV) | |||
|---|---|---|---|---|
Outcomes | HIV Positive (EIA+ & WB+) | False HIV Negative (EIA-) | False HIV Positive (EIA+ & WB-) | True HIV Negative (EIA-) |
Probability of result | (PHIV ∗ SenEIA ∗ SenWB ) | (PHIV ∗ (1 − SenEIA)) | ((1 − PHIV) ∗ (1 − SpecEIA) ∗ SpecWB) | (1 − PHIV) ∗ SpecEIA |
Inputs | ||||
 Visit 1: Initial Screening | ||||
  Consult time | 30 Min | 30 Min | 30 Min | 30 Min |
  Staff Wage (Rate/Hour): | $45.12 | $45.12 | $45.12 | $45.12 |
  Staffing | Clinical Nurse | Clinical Nurse | Clinical Nurse | Clinical Nurse |
 Pathology costs | ||||
  EIA | $18.54 | $18.54 | $18.54 | $18.54 |
  WB confirmatory | $84.54 | $84.54 | ||
 Visit 2: Test Results | ||||
  Consult time | 60 Min | 30 Min | 30 Min | 30 Min |
  Staff Wage (Rate/Hour): | $78.00 | $45.12 | $45.12 | $45.12 |
  Staffing | Staff specialist (Level 18) | Clinical Nurse | Clinical Nurse | Clinical Nurse |
Total Cost of Each Outcome | $203.64 | $63.67 | $148.21 | $63.67 |
Average cost per person tested | =(PHIV ∗ SenEIA ∗ SenWB) ∗ AC per True HIV PositiveEIA + , WB+ + (PHIV ∗ (1 − SenEIA)) ∗ AC per False HIV NegativeEIA− + ((1 − PHIV) ∗ SpecEIA) ∗ AC per True HIV NegativeEIA− + ((1 − PHIV) ∗ (1 − SpecEIA) ∗ SpecWB)) ∗ AC per False HIV PositiveEIA + , WB− | |||
Average number of tests for a positive diagnosis | \( =\frac{1}{P_{HIV}\ast Se{n}_{EIA}\ast Se{n}_{WB}} \) | |||